Title of article :
Estimation of pump operational state with model-based methods
Author/Authors :
Ahonen، نويسنده , , Tero and Tamminen، نويسنده , , Jussi and Ahola، نويسنده , , Jero and Viholainen، نويسنده , , Juha and Aranto، نويسنده , , Niina and Kestilن، نويسنده , , Juha، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Pages :
7
From page :
1319
To page :
1325
Abstract :
Pumps are widely used in industry, and they account for 20% of the industrial electricity consumption. Since the speed variation is often the most energy-efficient method to control the head and flow rate of a centrifugal pump, frequency converters are used with induction motor-driven pumps. Although a frequency converter can estimate the operational state of an induction motor without external measurements, the state of a centrifugal pump or other load machine is not typically considered. The pump is, however, usually controlled on the basis of the required flow rate or output pressure. As the pump operational state can be estimated with a general model having adjustable parameters, external flow rate or pressure measurements are not necessary to determine the pump flow rate or output pressure. Hence, external measurements could be replaced with an adjustable model for the pump that uses estimates of the motor operational state. Besides control purposes, modelling the pump operation can provide useful information for energy auditing and optimization purposes. s paper, two model-based methods for pump operation estimation are presented. Factors affecting the accuracy of the estimation methods are analyzed. The applicability of the methods is verified by laboratory measurements and tests in two pilot installations. Test results indicate that the estimation methods can be applied to the analysis and control of pump operation. The accuracy of the methods is sufficient for auditing purposes, and the methods can inform the user if the pump is driven inefficiently.
Keywords :
Pumps , Fluid flow control , State estimation , variable-speed drives , Energy efficiency
Journal title :
Energy Conversion and Management
Serial Year :
2010
Journal title :
Energy Conversion and Management
Record number :
2335125
Link To Document :
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